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/*
* Copyright (c) 2014 Intel Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
*/
#include <X11/Xlib.h>
#include <X11/Xlib-xcb.h>
#include <X11/xshmfence.h>
#include <xcb/xcb.h>
#include <xcb/dri3.h>
#include <xcb/sync.h>
#include <unistd.h>
#include <stdlib.h>
#include "dri3.h"
Pixmap dri3_create_pixmap(Display *dpy,
Drawable draw,
int width, int height, int depth,
int fd, int bpp, int stride, int size)
{
xcb_connection_t *c = XGetXCBConnection(dpy);
if (fd >= 0) {
xcb_pixmap_t pixmap = xcb_generate_id(c);
xcb_dri3_pixmap_from_buffer(c, pixmap, draw, size, width, height, stride, depth, bpp, fd);
return pixmap;
}
return 0;
}
int dri3_create_fd(Display *dpy,
Pixmap pixmap,
int *stride)
{
xcb_connection_t *c = XGetXCBConnection(dpy);
xcb_dri3_buffer_from_pixmap_cookie_t cookie;
xcb_dri3_buffer_from_pixmap_reply_t *reply;
cookie = xcb_dri3_buffer_from_pixmap(c, pixmap);
reply = xcb_dri3_buffer_from_pixmap_reply(c, cookie, NULL);
if (!reply)
return -1;
if (reply->nfd != 1)
return -1;
*stride = reply->stride;
return xcb_dri3_buffer_from_pixmap_reply_fds(c, reply)[0];
}
int dri3_create_fence(Display *dpy, Pixmap pixmap, struct dri3_fence *fence)
{
xcb_connection_t *c = XGetXCBConnection(dpy);
struct dri3_fence f;
int fd;
fd = xshmfence_alloc_shm();
if (fd < 0)
return -1;
f.addr = xshmfence_map_shm(fd);
if (f.addr == NULL) {
close(fd);
return -1;
}
f.xid = xcb_generate_id(c);
xcb_dri3_fence_from_fd(c, pixmap, f.xid, 0, fd);
*fence = f;
return 0;
}
void dri3_fence_sync(Display *dpy, struct dri3_fence *fence)
{
xcb_connection_t *c = XGetXCBConnection(dpy);
xshmfence_reset(fence->addr);
xcb_sync_trigger_fence(c, fence->xid);
xcb_flush(c);
xshmfence_await(fence->addr);
}
void dri3_fence_free(Display *dpy, struct dri3_fence *fence)
{
xcb_connection_t *c = XGetXCBConnection(dpy);
xshmfence_unmap_shm(fence->addr);
xcb_sync_destroy_fence(c, fence->xid);
}
static void dri3_query_version(xcb_connection_t *c, int *major, int *minor)
{
xcb_dri3_query_version_reply_t *reply;
reply = xcb_dri3_query_version_reply(c,
xcb_dri3_query_version(c,
XCB_DRI3_MAJOR_VERSION,
XCB_DRI3_MINOR_VERSION),
NULL);
if (reply != NULL) {
*major = reply->major_version;
*minor = reply->minor_version;
free(reply);
}
}
static int dri3_exists(xcb_connection_t *c)
{
const xcb_query_extension_reply_t *ext;
int major, minor;
major = minor = -1;
ext = xcb_get_extension_data(c, &xcb_dri3_id);
if (ext != NULL && ext->present)
dri3_query_version(c, &major, &minor);
return major >= 0;
}
int dri3_open__full(Display *dpy, Window root, unsigned provider)
{
xcb_connection_t *c = XGetXCBConnection(dpy);
xcb_dri3_open_cookie_t cookie;
xcb_dri3_open_reply_t *reply;
if (!dri3_exists(c))
return -1;
cookie = xcb_dri3_open(c, root, provider);
reply = xcb_dri3_open_reply(c, cookie, NULL);
if (!reply)
return -1;
if (reply->nfd != 1)
return -1;
return xcb_dri3_open_reply_fds(c, reply)[0];
}
int dri3_open(Display *dpy)
{
return dri3_open__full(dpy, RootWindow(dpy, DefaultScreen(dpy)), None);
}
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